Computer speed is measured in:

The correct answer is clock speed (Hz) because computer speed is fundamentally determined by how many cycles the microprocessor can complete in a second. Clock speed is measured in hertz (Hz), where 1 hertz represents one cycle per second. The higher the clock speed, the more instructions the processor can execute in a given time frame, directly influencing the performance and speed of the computer.

Other choices, although related to computing, serve different functions. Baud rate, for instance, measures the speed of data transmission in telecommunications rather than computer processing speed. Voltage typically represents electrical potential and power supply levels, which are essential for the functioning of electronic components but do not directly indicate processing speed. Bytes refer to a unit of digital data, measuring storage capacity or data transfer size, rather than speed of operation.